NASA's flagship space telescope has definitively detected the presence of dimethyl sulfide gas in the atmosphere of a distant exoplanet. On Earth, this gas is produced exclusively by living organisms, specifically marine phytoplankton. This provides scientists with one of the strongest pieces of evidence for the existence of extraterrestrial life to date.
The confirmed presence of dimethyl sulfide in the atmosphere of K2-18b opens a qualitatively new phase in the search for alien life. Notably, this is no ordinary chemical compound, but an organic signature directly linked to biological processes on Earth.
Nevertheless, the scientific community remains cautious in its assessments, as non-biological chemical reactions previously unknown to science could also be possible under extraterrestrial conditions. Subsequent observations will reveal whether this is indeed the first evidence of an alien biosphere.
